Soviet whalers wiped out blue whales from part of the Indian Ocean 50 years ago. Underwater audio reveals the gentle giants have returned.

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Blue whale swimming just below ocean surface.
Blue whale near Sri Lanka.

eco2drew/Getty Images

Doctors baffled after spotting a fly inside a Missouri man's intestines during a routine colonoscopy

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A fly.
A fly.

Getty Images

Telescope in Utah detects mysterious cosmic ray beyond our galaxy

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Artist's illustration of ultra-high-energy cosmic ray astronomy to clarify extremely energetic phenomena.
Artist's illustration of ultra-high-energy cosmic ray astronomy to clarify extremely energetic phenomena.

OSAKA METROPOLITAN UNIVERSITY/KYOTO UNIVERSITY/RYUUNOSUKE TAKESHIGE

WHO questions China about a mystery illness linked to pneumonia as hospitals fill with sick children

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Beijing, China.
Beijing, China.

Martin Puddy/Getty Images

10 iconic animals that were at risk of extinction but rebounded after the Endangered Species Act passed 50 years ago

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A gray wolf, a bald eagle, and a grizzly bear
A gray wolf, a bald eagle, and a grizzly bear

Joe McDonald/Getty Images; Axel Goehns/Getty Images; Cris Cantón/Getty Images

A cluster of sunspots 15 times bigger than Earth could send a solar storm our way as early as Saturday

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A cluster of sunspots is seen highlighted by an arrow and a circle on a picture of the sun.
A cluster of sunspots, 15 times the size of the Earth, seen on November 23, 2023.

SDO/NASA

The world's biggest iceberg is on the move after 37 years, and it could threaten wildlife

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A map of Antarctica is shown overlaid with a track following A23a over the year.
A satellite visualisation shows the path taken by A23a since August 2022

NASA Worldview

A tiny ancient elephant that roamed Sicily 200,000 years ago had babies the size of pet dogs

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A photograph of an exhibit at the American Museum of Natural History showing a reconstructed model of a Sicilian dwarf elephant and its baby.
An adult Sicilian dwarf elephant was about the size of Shetland pony. Its baby was more akin to a dog.

Maiya Focht

How do the Croc Docs, a team of Florida scientists who wrangle crocodiles and alligators, stay safe? 'Very carefully.'

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Image of three tiny crocodile babies held by a person's hand, beside and image of a woman holding down an alligator with a taped mouth.
Crocodile hatchlings; Wildlife technician Analise Fussell on an alligator catch.

University of Florida's Croc Docs

The mystery of how the moon formed is still puzzling scientists. The secret could lie deep within our planet.

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an artist's illustration shows a planet crashing into the Earth, causing a huge explosion, with debris flying towards the camera.
An artist's impression of how a violent impact about may have created the moon.

Tobias Roetsch/Future Publishing via Getty Images

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